EP2193964B1 - Hauptbremszylinder - Google Patents

Hauptbremszylinder Download PDF

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Publication number
EP2193964B1
EP2193964B1 EP09176985A EP09176985A EP2193964B1 EP 2193964 B1 EP2193964 B1 EP 2193964B1 EP 09176985 A EP09176985 A EP 09176985A EP 09176985 A EP09176985 A EP 09176985A EP 2193964 B1 EP2193964 B1 EP 2193964B1
Authority
EP
European Patent Office
Prior art keywords
master cylinder
cylinder body
fixing
sleeve
fixing plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP09176985A
Other languages
English (en)
French (fr)
Other versions
EP2193964A1 (de
Inventor
Alain Benoit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2193964A1 publication Critical patent/EP2193964A1/de
Application granted granted Critical
Publication of EP2193964B1 publication Critical patent/EP2193964B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/20—Tandem, side-by-side, or other multiple master cylinder units

Definitions

  • the invention relates to a master brake cylinder and in particular a master cylinder whose outer shape is linear and elongated along the axis of the bore of the master cylinder.
  • the invention also relates to a manufacturing method for producing such a master cylinder.
  • Master brake cylinders known in the art are generally manufactured by molding and then machining (machining the inside of the bore, drilling access holes, etc.). The manufacture of the master cylinders is therefore relatively long and expensive because of the molding operations.
  • a master cylinder comprising a two-piece master cylinder body according to the preamble of the independent claim is known from the document DE 10 2006 048 A1 .
  • the invention proposes a faster and less expensive method of manufacture.
  • the master cylinders obtained are more compact and less bulky.
  • certain parts that make up the master cylinder according to the invention can be made of plastic which makes it possible to have a lighter master cylinder.
  • the body of the master cylinder according to the invention can be made of pressed sheet which reduces the thickness of the walls and thus reduce the volume and weight of the master cylinders.
  • the first and second parts of the master cylinder body are made of stamped metal sheets.
  • the first part and the second part of the master cylinder body each comprise at least one attachment plate perpendicular to the axis of the master cylinder. These plates are intended to be fixed to one another.
  • one of said fixing plates is crimped or welded to the other fixing plate.
  • the fixing plate of the second part of the master cylinder body comprises at least three fastening tabs which are bent over the periphery of the fastening plate of the first part of the master cylinder body and which enclose this fixing plate.
  • the invention then possibly provides that the periphery of the fixing plate of the first part the master cylinder body has notches allowing the passage of the bent portions of the fastening lugs to allow the establishment of the fixing plates against each other.
  • said fixing lugs are crimped on the periphery of the fixing plate of the first part of the master cylinder body.
  • the first part of the master cylinder body contains only part of the axial length of the sleeve and the second part of the master cylinder body fits on the part of the sleeve that emerges from the first part of the body of the master cylinder. master cylinder.
  • the first part of the master cylinder body contains the entire sleeve and the second part of the master cylinder body has a substantially planar shape which is perpendicular to the axis of the master cylinder.
  • said fixing plates comprise fixing holes passing through the two plates and make it possible to fix the master cylinder against a wall of a braking assistance servomotor by means of screws passing through said holes. fixation.
  • said first and second parts of the master cylinder body are of pressed sheet metal and said sleeve is made of plastic material.
  • the invention also relates to a method for manufacturing a brake master cylinder thus described.
  • the attached figure shows an example of master cylinder according to the invention.
  • This master cylinder is of the type comprising a two-part master cylinder body.
  • a first part 1 of the master cylinder body which contains a cylindrical piece 3 which we will call sleeve in the following description.
  • This sheath 3 has a bore cylindrical forming primary and secondary pressure chambers 17 and 18 of the master cylinder in which slide a primary piston 60 and a secondary piston 61.
  • Accesses 11 and 12 are connected to a brake fluid reservoir and make it possible to supply the primary and secondary chambers 17 and 18 respectively with brake fluid.
  • Outputs 13 and 14 are intended to be connected to the hydraulic braking circuits of the vehicle.
  • Seals provide a seal between the pistons 60 and 61 and their pressure chambers and between the sleeve 3 and the master cylinder body 1. For simplicity, these seals have not been shown in the figure.
  • a second part 2 of the master cylinder body which we will call plug in the following description is attached to the first part of the master cylinder body so as to close the body of the master cylinder and to keep the sleeve inside.
  • This plug 2 comprises an axial hole allowing passage of the primary piston or a push rod for acting on the primary piston.
  • the first part of the body of the master cylinder 1 and the plug 2 are made of stamped sheet metal.
  • the first part 1 of the master cylinder body and the plug 2 have fastening plates 10 and 20 respectively which are perpendicular to the axis XX 'of the master cylinder and which are intended to be fixed to one another.
  • the plate 20 of the cap 2 has tabs such that the tab 41 which is folded around the outer end 40 of the plate 10.
  • the tabs 41 are crimped onto the ends 40 of the plate 10.
  • the plate 10 of the first part of the body of the master cylinder has notches whose widths are sufficient to allow the passage of the curved legs 41 and to press the plates 10 and 20 against each other. the other.
  • the rotation of a few degrees of the plug relative to the first part of the master cylinder body allows to secure the cap and the first part of the body of the master cylinder.
  • the assembly thus formed is reinforced by clamping the tabs 41 against the ends 40.
  • the plate 10 therefore has at least as many notches as the cap has tabs 41. the preceding example, the plate 10 has three notches distributed at 120 ° on the periphery of the plate 10.
  • At least one fixing device 7 comprising, for example, a screw and a nut make it possible to fix the master brake cylinder to a wall of a brake booster.
  • the sheath 3 is contained only partially in the first part 1 of the master cylinder and the stopper 2 is fitted on the sheath 3.
  • the sleeve is entirely contained in the first part of the master cylinder and the plug 2 has a generally flat shape.
  • the invention also relates to a method for manufacturing a master cylinder thus described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)
  • Braking Arrangements (AREA)

Claims (11)

  1. Hauptbremszylinder mit einem Hauptzylinderkörper aus zwei Teilen:
    - einem ersten Teil (1) mit einer Hülse (3), die mit einer Bohrung versehen ist, welche eine primäre (17) und eine sekundäre Druckkammer (18) bildet, in denen ein primärer und ein sekundärer Kolben (60, 61) gleiten,
    - einem zweiten Teil (2), der als Verschlussstopfen für den Hauptzylinder dient und am ersten Teil (1) befestigt ist,
    dadurch gekennzeichnet, dass
    der erste und der zweite Teil (1, 2) des Hauptzylinderkörpers aus tiefgezogenen Metallblechen hergestellt sind.
  2. Hauptzylinder nach Anspruch 1, dadurch gekennzeichnet, dass der erste und der zweite Teil (1, 2) des Hauptzylinderkörpers jeweils mindestens eine Befestigungsplatte (10, 40, 20) aufweisen, wobei die Befestigungsplatten senkrecht zur Achse (XX') des Hauptzylinders verlaufen und aneinander befestigt sein sollen.
  3. Hauptzylinder nach Anspruch 2, dadurch gekennzeichnet, dass eine der Befestigungsplatten auf der anderen Befestigungsplatte verstemmt oder geschweißt ist.
  4. Hauptzylinder nach Anspruch 2, dadurch gekennzeichnet, dass die Befestigungsplatte des zweiten Teils (2) des Hauptzylinderkörpers mindestens drei Befestigungslaschen (41) aufweist, die auf den Umfang der Befestigungsplatte (40) des ersten Teils des Hauptzylinderkörpers umgebogen sind und diese Befestigungsplatte (40) umschließen.
  5. Hauptzylinder nach Anspruch 4, dadurch gekennzeichnet, dass der Umfang der Befestigungsplatte (10, 40) des ersten Teils des Hauptzylinderkörpers Einkerbungen aufweist, die das Durchführen der umgebogenen Abschnitte der Befestigungslaschen (41) ermöglichen, so dass die Befestigungsplatten aneinander gedrückt werden können.
  6. Hauptzylinder nach Anspruch 4, dadurch gekennzeichnet, dass die Befestigungslaschen (41) auf den Umfang der Befestigungsplatte (40) des ersten Teils (1) des Hauptzylinderkörpers verstemmt sind.
  7. Hauptzylinder nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der erste Teil (1) des Hauptzylinderkörpers lediglich einen Abschnitt der axialen Länge der Hülse (3) enthält und der zweite Teil (2) des Hauptzylinderkörpers auf den Abschnitt der Hülse aufgesetzt ist, der aus dem ersten Teil (1) des Hauptzylinderkörpers herausragt.
  8. Hauptzylinder nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der erste Teil (1) des Hauptzylinderkörpers die Hülse (3) vollständig enthält und der zweite Teil (2) des Hauptzylinderkörpers eine nahezu ebene Form hat, die senkrecht zur Achse (XX') des Hauptzylinders verläuft.
  9. Hauptzylinder nach einem der Ansprüche 7 oder 8, dadurch gekennzeichnet, dass die Befestigungsplatten Befestigungslöcher aufweisen, die die beiden Platten durchqueren und die Befestigung des Hauptzylinders an einer Wand eines Servomotors zur Bremsunterstützung mittels Schrauben ermöglichen, welche die Befestigungslöcher durchqueren.
  10. Hauptzylinder nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Hülse aus Kunststoff besteht.
  11. Verfahren zur Herstellung eines Hauptbremszylinders nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    - Schritt 1: Herstellen der beiden Teile des Hauptzylinderkörpers und der Hülse,
    - Schritt 2:Anordnen der Hülse im ersten Teil des Hauptzylinderkörpers,
    - Schritt 3:Anbringen des zweiten Teils des Hauptzylinderkörpers, wobei seine Befestigungsplatte (20) an die Befestigungsplatte (10) des ersten Teils des Hauptzylinderkörpers angefügt wird,
    - Schritt 4:axiales Blockieren des zweiten Teils des Hauptzylinderkörpers am ersten Teil des Hauptzylinderkörpers durch festes Verbinden der Befestigungslaschen durch Verstemmen oder Schweißen.
EP09176985A 2008-12-05 2009-11-25 Hauptbremszylinder Not-in-force EP2193964B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0806852A FR2939392B1 (fr) 2008-12-05 2008-12-05 Maitre cylindre de frein

Publications (2)

Publication Number Publication Date
EP2193964A1 EP2193964A1 (de) 2010-06-09
EP2193964B1 true EP2193964B1 (de) 2011-08-24

Family

ID=41128135

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09176985A Not-in-force EP2193964B1 (de) 2008-12-05 2009-11-25 Hauptbremszylinder

Country Status (3)

Country Link
EP (1) EP2193964B1 (de)
AT (1) ATE521510T1 (de)
FR (1) FR2939392B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2969083B1 (fr) * 2010-12-17 2012-12-28 Bosch Gmbh Robert Dispositif de ressort primaire de maitre-cylindre tandem et maitre-cylindre ainsi equipe
FR2969086B1 (fr) 2010-12-21 2016-04-29 Bosch Gmbh Robert Piston primaire de maitre-cylindre tandem et maitre-cylindre tandem equipe d'un tel piston primaire

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19854106A1 (de) * 1998-11-24 2000-05-25 Continental Teves Ag & Co Ohg Hauptzylinder
DE10055256A1 (de) * 1999-11-10 2001-07-26 Aisin Seiki Hauptbremszylinder
DE102006048184A1 (de) * 2006-10-10 2008-04-17 Freudenberg Pspe S.A.S. Hauptzylinder

Also Published As

Publication number Publication date
ATE521510T1 (de) 2011-09-15
EP2193964A1 (de) 2010-06-09
FR2939392B1 (fr) 2011-04-08
FR2939392A1 (fr) 2010-06-11

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